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H. LANGENHEIIVI. AUTOMATIC WATER HEATER. APPLICATION man 001.28. 1915.

L1 9mm PatentedAugi 15,1916.

j r fi\ W a WITNESS INVENTOR trainees.

' Pittsburgh, in the county of State of Pennsylvania, have invented anew 7 HAY L'Anennnnrrr, or PITTSBURGH, rnnn'srrvama AUTOMATICwarns-HEATER.

Specification of Letters Patent Application filed October 28, 1915.Serial No. 58,332.

To al lwhom it may concern:

Be i known that I, HAY LANGENHEIM, a citizen of'the United Statesresiding at and useful Improvement in Automatic Water-Heaters,"of whichimprovement the ditionsis absolutely safe.

following is a specification.

My invention relates to .water heaters of the so-called instantaneoustype.

My invention has for its principal object, to provide an instantaneousautomatic gas water heater capable of operating under any conditions ofwater pressure at all times.

Another object is to provide a water heater which at all times and underallcon- With the above and other objects in view,

the invention consists in certain features of construction, arrangementand combination of parts as will bexhereinafter fully set forth andparticularly pointed out in the append ed claims.

In the accompanying drawings, which form a part of this specification,l[ have shown one embodiment of my invention wherein- Figure 1 is a sideelevation of aheater, partly shown in section and diagrammatically. Fig.2 is a side elevation of one pair of the electric contacts, and lFig.v 3is'a side elevation of another pair of contacts. I

Referring to said drawings forthe construction and general arrangement,the nu meral 1 designates the shell of the heater,

' 2, a Water heating coil located therein, and

3 a gas burner disposed in the base of the shell all or any of which maybe of any suita le form.

Located in the gas llne 4, ad acent the gas cock 5,'is a gas valvemechanlsm for controlling the gas supplied to the burner,

comprising a gas chamber 6 having a gas Orifice 7 therein, controlled bya gravlty fiber, the lower head thereo opening formed therethroughthrough which extends'the stem of the gas valve. Within 'thischamber issecured a solenoid.

seating valve 8 having a stem 9 extending therefrom. This chamber hasattached thereto a cylindrical chamber 10 having a removable head '11,preferabl formed of having an magnet 12, surrounding the stem of the gasvalve, the terminal wires of which are connected to binding posts .l313in the insulated head 11.

Allegheny and Connected to the cold water intake line 14 is a thermostatdevice, comprising a casing 15 having secured therein, by its head, 16,a thermostat tube 17, having a high coefiicient of expansion. andcontraction, and within which is arranged a rod 18 having a very lowcoefficient of expansion and contraction. This rod rests at its lowerend on the head at the, lower end of the thermostat tube and the upperend thereof extends up point. The casing 15 is connected to the lowerend of a second thermostat tube being-connected to the cold Water inletof the heater coil, a regulating cock 21 being interposed betWeen thecoil and'thermostat tube for regulating the quantity of water admittedto the coil, and a pointed stem 21 fixed to the lower end of the tube.This thermostat device is supported on a frame suitably connected to theheater shell, said frame comprising the two horizontally disposed heads23 and 24, connected together by the vertically disposed rods 25. Thesaid thermostat tube is surrounded near its lower end by a gas burner27, and above the burner by a spirally wound wire coil 28, to confinethe heat about the tube, and inclosed within the casing 29 surroundingthe same. To the gas burner 27 is attached a small gas supply line 30which leads from the main gas supply line 4 at a point below the asvalve 8, said supply line 30 having inclu ed therein a gas cock 31 and acheck valve 32 thereabove. Connected-in this line, between the burnerand check valve, is another small gas line 33, which leads from the maingas supply line at a point above the gas cook 5, said small gas linebeing provided with a gas cock 33'.- A third thermostatic device isemployed in connection With the heater,

- comprising a tubular casing 34, closed at its rear end extendingthrough the heater shell above the burner 3 and beneath the heater coil,the forward end thereof being connected to the outlet end of the heatercoils and the rear end connected to the hot water supply line 35 havinga spigot 36. This casing has secured in the forward end a thermostattube37 which is closed at its rear end and has arranged therein a thermostatrod 38, said rod engaging the. rear'of'the pointed end extendtube andthe forward ing therefrom.

A suitable spark device 39 is provided for igniting the gas issuingfromthe gas burn- Patented Au 115, acre.

.through. the head 16 and terminates in a ers, the termihals of whichsparking device are connected in series with the secondary winding41of-a suitable induction or spark coil,'..'the primary winding 42ofwhich is providedwith' a make and break connection 43 and. The primarywinding of the j spark coil and the solenoid of the gas valve arebothconnected 'up in series with a suit- .able' source of current supply, asare also certa'inm'ake and break "contacts controlledby y thethermostats for operating said magnetic c oil. This circuit and contactscomprise the .twowires'45 and 46, the wire 45 leading -to" the make andbreak contact of the primary ,winding of the spark coil, and the wire 46to the opposite end of said primary f winding. Included in this circuitare the two sets of thermostatic controlled contacts,

comprising an insulated contact .47 on the end of a lever 48, which ispivoted to the lower head 24 of the upper thermostat frame, the shortend of said lever being in engagement with the end of the, thermostatstem 21'. The-companion contact49, inl this side, of the circuitis-insulatedly arranged in the end of a lever 50, which is pivoted to,

the head 16 of the thermostat tube 17, and is,

/ I engaged "byythe'. thermostat rod 18. This pair of contactsarenormally separated.

,Thelever 50has a :weight 51 at the short end thereof to maintain thesame in contact I with the thermo rod. The other set of contacts intheopposite side of the circuit, com:

prise an adjustable contact 52 slidably fitted into an insulatedsleeve53, in the end of an arm 54.which is rigidly fixed to the end. of

the heater-thermostat, saidcontact being provided with a spiral spring55. The companion contact of this set comprises an 111-.

sulated contact 56 arranged. in one end of 'a lever 57, pivotall-yarranged at the end of the thermostat, and having a balance weight 58'at. the short end thereof. These contacts are normally in engagementwith: one

another. The contacts 47 and'49 are set'toi.

' engage and close the circuit at a predeter-' mined temperature and thecontacts 52 and 2 56- are set to separate at a predeterminedtemperature.A

. In practice, gas fed from the pipe 33 .to'

. and issuing from the burner 27 of the up- 4 ;per'thermostat device iskept burning low, or sufficient to normally maintain a slight increaseof temperature over that of the incomingcold-water. This difference intemperature'normally maintains separation of the contacts 47 and 49.

In Fig. 1, the heater is shown as having its operating parts in normal,position. When water is to be dra Wn, the operation .will be asfollows: Opening the spigot 36 1 causes the water to flow from theservice linethroughthe-heatcr. The incoming cold water passin'g'throughthethermostat casing 15 and the connecting tube 20 and I niter 39ceases.

through the thermbstat tube 19,1. cools the tube 19 to the temperatureof the incoming water, the contraction of which raises the stem 21 andallows the electric contact point 47 to drop and engage with itsopposite contact point 49. The bringing of these'oomv tacts togethercloses the electric circuit and i .the current passes around themagnetic coil 12. This magnetic coil 12, by means of its core, in thiscase being the stem 9 of the disklvalve 8, raises the valve from itsseat 7 I and allows the gas to flow through the gas line 4 to the burner3. The closing of this circuit also operates the spark coil, causin ajump spark at the igniter 39. This sparc ignites the gas which plays onthe coil and heats the Water passing therethrough. As

- in temperature than the point at which the contact is broken, the tube'37 contracts and pushes the rod 38 against the lever 57 and againclosesthe electric circuit, causing the magnetic .coilto again lift thegas valve from its seat, and allowing the gas to flow to the burners,where it is again ignited by the igniter 39. When the faucet 36isclosed,

circulation of the water ceases andthc ther- -m o' stat tube 19 which isstill heated from 'thebu-rner expands and breaks the contact Y betweenpoints471and' 49, thus closing the gas valve and-cutting ofi the gas tothe burner. When the gas valve disk 8 is seated, the flame at burner 27is regulated by the cock 33 in the line 33, .to such an i extent as tojust- Suppl enough heat to keep the contact points 4 and 49 separated.

When the-valve disk-8 is raised an' addi- 1 tional 'supplyf'of' gas tothe burner 27 through the line 30'takes place, causing the flame at thebummer to be considerably increased and to burn-full at all times whenthe main gas line .4 is opento. theburners3.

When the gas valve is closed fthe flame at the burner 27 is cut down toits original low condition. Due to the fact that the temperature of thei1'1comingwa'ter' varies at" i difi'erent seasons of the year, themotion of 1 the lever 48 and contact point 47 due to expansion and.contraction'of the thermostat tube 19, will necessarily varyaccordingly.

-However, as thecold water operates both tube17 and tubef'19, the lever50 is so arranged as to normally keep thedistancebetween points 47 and49 the same at all seasons of the year.

. by said thermostatic operated means, a second thermostatic-meansconnected to the hot Water outlet of the coil, and contact means also insaid circuit and operated by said sec- 0nd thermostatic means.

2. In a water heater, a Water heating coil having a cold water inlet anda hot water outlet, a gas burner, a gas conduit leading to said burner,a gas valve in saidlconduit, an

electric circuit, means in said circuit; for operating said valve,thermostatic operated means in the cold water inlet side of the coil,contact means in the electric circuit operated by said thermostat,thermostatic means connected to the hot water outlet of the coil,contact means also in said circuit operated by said thermostat, andsparking means operated from said circuit for igniting the gas from saidburner; v

3. In a water heater, a water heating coil having a cold water inlet anda hot water outlet, a gas burner, a gas conduit leading to said burner,a gas valve in saidconduit, an electric circuit, means in said circuitfor operating said valve, a pair of thermostats located in the coldwater intake to said coil, each being provided with and operating anelectric contact connected in said, circuit, a thermostat locatedin thehot water outlet of the coil above the burner, and contacts operated bysaid thermostat and included in said'circuit. 1

4. In a Water heater, a water heating coil having a cold water inlet anda hot water outlet, a gas burner, a gas conduit leading to said humor, agas alve in said conduit, an electric circuit, means in said circuit foroneach being provided with and operatingan electric contact connected insaid circuit, a

thermostat located in the hot water outlet of the coil above the burner,contacts operated by said thermostat and included in said circuit, andsparking means operated from said circuit for igniting the gas from saidburner.

55. In a water heater, a water heating coil having a cold Water inletand a hot water outlet, a gas burner, a gas conduit leading to saidburner, a gas valve in said conduit, an electric circuit, means in saidcircuit for operating said valve, a pair of thermostats located in thecold water intake to said coil, each'being provided with and operatingan electric contact connected in said circuit, a thermostat located inthe hot water outlet of the coil above the burner, contacts operated bysaid thermostat and included in said circuit, and sparking meansoperated from said circuit for igniting the gas from said burner, one ofsaid thermostats in the cold water inlet being provided with a gasburner connected to said conduit.

6. In a water heater, a water heating coil having a cold water inlet anda hot water ou'tlet,-a gas burner, a gas conduit leading to said burner,a gas valve in said conduit, an electric circuit, means in said circuitfor op.- erating said valve, thermostatic operated means in the coldwater inlet side of said coil, normally. open contact means in saidcircuit operated by said thermostatic operated means, a secondthermostatic means connected to the hot water outlet of the coil, andnormally closed contact means also in said circuit and operated by saidsecond thermostatic means. v

In testimony whereof, I have hereunto signed my name n the presence oftwo subscribing witnesses.

HAY LANGENHEIM.

, In the presence of---" JAMES HAY, Inc. P. REINECKE.

